问如何使用PHP获取整个MongoDB集合

EN

<?php

$user = "xxxx";
$pwd = 'xxxx';

if (isset($_POST['needleID'])) {
    $needleID = $_POST['needleID'];
} else {
    echo "needle ID not set";
}

//Manager Class
$connection = new MongoDB\Driver\Manager("mongodb://${user}:${pwd}@localhost:27017");

// Query Class
$filter = ['id'=> $needleID];
$query = new MongoDB\Driver\Query($filter);

// Output of the executeQuery will be object of MongoDB\Driver\Cursor class
$rows = $connection->executeQuery('DBNAME.DBCOLLECTION', $query);

// Convert rows to Array and send result back to javascript as json
$rowsArr = $rows->toArray();
echo json_encode($rowsArr);

?>